I changed my user ID (on another Forum) because I had adopted my my previous ID as tribute to my then-girlfriend, and she broke up with me; so it seemed reasonable and appropriate to drop the implication of our couplehood. About the same time, I encountered "Cruithne" via a science fiction book that prominently featured the asteriod that has been given that name. It had a nice ring to it, and has Celtic origins, so I decided to adopt the designation. As I was riding my bicycle around sunset, and thinking about the name, the rising moon evoked a strong reaction in me, hence the "la Luna" part. Besides, Cruithne (the asteroid) is loosely called a "second moon," relative to the Earth.
Along with the change of user ID, I decided to quit trying so hard to be nice, sweet, and loving all the time - not deliberately going to the other extreme, and still striving to be respectful of others, but shifting a little bit away from what I felt was possibly, sometimes, more warmth & fuzziness than was called for. Another way of explaining this is that I decided to be more embracing of my Shadow Self. (bwahahahaha)
Cruithne